.mid-top{
    background-color: #d9d5d5;
    width: 1260px;
    height: 40px;
    padding: 10px 330px;
}
.mid-top>div:nth-child(2)>div{
    padding: 20px 80px;
}
.mid-top>div:nth-child(2)>div:hover{
    cursor: pointer;
    color: white;
    background-color: #00bb00;
}
.project-case{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    width: 1000px;
    margin: 0 0 0 300px;
}
.mid>div:nth-child(4)>div:hover{
    cursor: pointer;
    color: white;
    background-color: black;
}